19907898468 has 12 divisors (see below), whose sum is σ = 46451763120. Its totient is φ = 6635966152.

The previous prime is 19907898443. The next prime is 19907898487. The reversal of 19907898468 is 86489870991.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829495758 + ... + 829495781.

It is an arithmetic number, because the mean of its divisors is an integer number (3870980260).

Almost surely, 2^19907898468 is an apocalyptic number.

It is an amenable number.

19907898468 is an abundant number, since it is smaller than the sum of its proper divisors (26543864652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19907898468 is a wasteful number, since it uses less digits than its factorization.

19907898468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658991546 (or 1658991544 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 69.

The spelling of 19907898468 in words is "nineteen billion, nine hundred seven million, eight hundred ninety-eight thousand, four hundred sixty-eight".